Year	Percent
1950	14.9305
1955	14.76665
1960	14.56811
1965	14.49204
1970	14.45257
1975	13.78484
1980	12.63383
1985	11.58374
1990	11.24301
1995	11.31779
2000	11.91767
2005	12.44821
2010	12.88484
2015	13.66127
2020	14.59627
2025	15.55125
2030	17.12036
2035	19.05496
2040	20.57494
2045	21.57292
2050	22.15082
2055	22.92241
2060	23.77806
2065	24.71277
2070	25.4234
2075	25.56339
2080	25.63617
2085	25.76006
2090	25.93058
2095	26.04944
2100	26.03917